The Greenland ice sheet is rapidly melting
Affected by the recent rare high temperature weather in many European countries, the ice sheet covering Greenland, the world's largest island, is melting in a large area, and from July 15 to 17 alone, the daily loss of ice has reached about 6 billion tons, enough to fill 7.2 million Olympic-size swimming pools.
Greenland is located in the northeast of North America, 3/4 of it is in the Arctic Circle, an area of nearly 1.8 million square kilometers, about 80% of the island is covered by ice sheets, second only to the Antarctic ice sheet, is the second largest ice sheet in the world.
Greenland's average annual temperatures are below 0 degrees Celsius, but recently we have seen short sleeves covered in television news reports.
Danish researchers say that the greenland ice sheet has accelerated its ablation rate after 2000. Last summer, we in Science Orly also reported that a torrential rain had fallen in Greenland, taking away 7 billion tons of water, what does this mean?
Greenland's glaciers are now melting at a rate unprecedented in thousands of years, and last summer's rains melted 872,000 square kilometers, or more than half of the area, and the amount of ice melted in one day exceeded 8 billion tons, reaching seven times that of the same period.
The World Meteorological Organization pointed out on the 19th that the rare high temperature weather that has recently swept Through Europe may become the "standard" in the European summer in the future, and the negative effects of climate change such as high temperatures will last at least until the 1960s, and the global glacier melting trend will last for hundreds of years or more.
What will sea level rise bring?
If all of Greenland's ice melts, global sea levels will rise by 7.5 meters.
This is a rather frightening crisis, which, when sea levels rise, directly lead to the submergence of low-lying islands, increase storm surges offshore, and the impact of ocean cyclones will be greater.
In 2015, the international scientific team publicly stated in the journal Science Advances that human beings burned up the remaining fossil fuels available to humans on Earth, and the greenhouse effect could cause the ice of the entire Antarctic to melt, which caused sea levels to rise by up to 60 meters and would bury up to 1 billion people in densely populated areas below sea level.
Someone did a data deduction:
As long as the sea level rises by 10 meters, parts of the mainland Jiangsu, Shandong, the bohai Sea and other parts will be submerged underwater.
After rising 20 meters, most areas such as Shanghai, Suzhou, and Hebei are gone.
At 30 meters, it basically entered the inland area of the mainland, and At this time, Jiangsu was basically completely submerged, and at the same time, Tianjin, Cangzhou, Shandong Qingdao and other cities were completely gone.
By 50 meters, the central area of Shandong is basically gone, and some areas of Beijing are under sea level, and important cities in the Pearl River Delta region are basically gradually submerged.
After 60 meters, more cities will continue to be submerged, and the above-mentioned cities will basically disappear completely and become underwater cities.
Of course, this is a simulation data, which can only show that the reference is the mainstay, but the crisis brought about by sea level rise must exist.
Greenhouse gas emissions are to blame
If humans want to stop sea levels from rising, they need to quickly control greenhouse gases
What is the greenhouse effect?
We know that the earth is wrapped in an atmosphere that is like the glass of a flower house, or the plastic film of a greenhouse.
The surface temperature of our baby on Earth is about 15 degrees, because there is warm sunlight, and after the sunlight shines through, this layer of atmosphere locks the temperature like a plastic film.
Without this film, what would the Earth look like? Look at the moon to know, the moon is no atmosphere, when the sun is illuminated by the temperature will rise sharply, will reach more than 120 degrees, and at night when there is no sunlight, the temperature will drop sharply, falling below minus 180 degrees.
It is precisely because of the atmosphere that we have a planet suitable for human habitation.
The main component of the Earth's atmosphere is nitrogen, which accounts for 78.1%, oxygen, 20.9%, and a small proportion of other gases.
But other gases are equally important, among them, carbon dioxide, methane, etc. are called greenhouse gases, including our water vapor, if these gases increase, simply put, it will make the plastic film of our greenhouse thicker and stronger, the thermal insulation effect becomes better, and the temperature of the baby on the earth will naturally rise, and if it is too high, it will have a fever!
What are the consequences of rising temperatures?
Over the past 100 years, the average temperature of the Earth has risen by about 1.1 degrees, which sounds like not much, but how much of an increase of 1.1 degrees in 100 years will have?
Every time the Earth's atmosphere rises, it can absorb 7% more water vapor, and water vapor will of course become rainfall, so this is the reason for the frequent occurrence of heavy rains around the world.
In addition to heavy rain, there are also cold waves, high temperatures, droughts and other extreme weather in the world, according to statistics, in the past 40 years, human beings have experienced more than 10,000 extreme weather, and there is a clear upward trend. After 2000, the number of extreme weather disasters experienced by human beings each year was about 300 to 400 times, which means that on average, one extreme weather disaster of one magnitude or a smaller or larger weather disaster was staged on the earth every day.
The latest climate report released by the United Nations predicts that around 2030, the Earth's temperature will be 1.5 to 1.6 degrees higher than before the Industrial Revolution, and according to the current trend, it will be 2 °C higher in 2065...
If it exceeds 2°C, the world will face crop yield reductions, water shortages, sea level rise, species extinctions...
The more sinister doomsday prophecy comes from British independent scientist James Lovelock, who believes that if the sea level rises to 3 °C and sea levels rise by at least 25 meters, then most of the earth will no longer be habitable for humans, 90% of the species will go extinct, and the number of humans may be reduced by 80%.
The doomsday catastrophe in the movies "The Day After Tomorrow" and "2012" will really appear.
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